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2nd arg to BeginPackage


My first question is, there seems to be a discrepancy between the
documentation for BeginPackage:
  BeginPackage["Package`", {"Needed1`", "Needed2`", ...}]
vs how standard packages use it:
  BeginPackage["Package`", "Needed1`", "Needed2`", ...]

My next question is, why doesn't either form do what I expect here:

BeginPackage["TestPkg`", "Statistics`"];
ff::usage = "Some function that uses CDF."
Begin["`Private`"];
ff[a_] := CDF[NormalDistribution[0,1], a]
End[];   (* Private context *)
EndPackage[];

In the definition of ff, it thinks the context for CDF (and
NormalDistr) is TestPkg`Private` instead of Statistics`...

How can I avoid spelling out the contexts for things like CDF?

Thanks a lot,
Daniel Reeves

--    --    --    --    --    --    --    --    --    --    --    -- 
Daniel Reeves               http://ai.eecs.umich.edu/people/dreeves/

"You think you know when you learn, 
 are more sure when you can write, 
 even more when you can teach, 
 but certain when you can program."  -- Alan Perlis



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